Oil reservoir enrichment law of Yan'an Formation Yan 8 to Yan 10 members in southern Ning County-Heshui,Ordos Basin
The sandstone oil in Yan 8-Yan 10 members of Yan'an Formation in the southern Heshui-Ning County showed good results,but the study on the characteristics of reservoir sandstone is scarce,and the oil reservoir enrichment law in the region is unknown,which seriously restricted the exploitation of conventional sandstone oil in the research area and the promotion of oilfield production and stable production in the research area.Based on the study of the characteristics of the storage sandstone,combined with the ancient geomorphic features and seismic data,the enrichment law was discussed and summarized into the accumulation mode.The results show that the high-quality muddy hydrocarbon source rock in Yanchang Formation is the material source of the Yan'an Formation oil reservoir in the southern of Heshui-Ningxian,and the deep oil and gas are transported to the high-quality reservoir through the paleo river dredging and fault communication.Traps formed by matching low amplitude structures are enriched and accumulated.The Yan'an Formation oil reser-voir in study area is mainly ancient geomorphic oil reservoir and tectonic-lithological oil reservoir,mainly based on slope ancient land-form accumulation mode,hemound structure-lithological accumulation mode and channel structure-lithological accumulation mode.
万方数据
维普
